Saw guide for undercutting



.Feb. 23,1926. 1,574,152

J. M. JENNINGS Smv GUIDE FOR UNDERGUTTING Filed may 22, 1925 2/ a a s.

Patented Feb. 23, 1925155,

UNIT l STATE is a sz ersnr rric.

SAW GUIDE FOR UNDERCUTIING.

Application filed m 22, 1925. Serial No. 32,078.

To aZZ whom it may concern:

Be it known that l, Josnrn M. JnnNiNcs, a citizen of the United States,residing at Centralia, in the county of Lewis and State of lVashington,have invented certain new and useful Improvements in Saw Guides forUndercutting, of which the following is a specification.

The present invention relates to a saw guide and has for its principalobject to provide a structure which will support and guide a saw, inorder that a log may be cut from the underside. When a tree has beenuprooted, it is. supported a distance above the ground, substantiallyhorizontally, by means of the roots and the branches of the tree, and itis desirable to cut the trunk of the tree from the underside so as toeliminate binding on the trough.

Another important object of the invention is to provide a device of thisnature which is adjustable to accommodate the saws of different sizes,and is also adjust, able to change the distance of the supporting rollerfrom the log.

A still further objectof the invention is to provide a device of thisnature, which is exceedingly simple in its construction, easy tomanipulate, strong, durable, eiiicient, reliable, and otherwise welladapted for the purpose for which it is designed.

lVith the above and numerous other objects in view, as will appear asthe descrip tion proceeds, the invention resides in certain novelfeatures of construction, and in the combination and arrangement ofparts as will be hereinafter more fully described and claimed. I

In the drawing:

Figure 1 is a view of the device, associ ated with a log,

Figure 2 is a side elevation of the device, I

and

Figure 3 is a plan view thereof.

Referring to the drawing in detail, it will be seen that 1 designates asupporting device, which tapers toward one end so that it may be easilydriven into a log, as indicated in Figure 1. A plate 2 is positioned onthe upper surface of: the spike land has its intermediate portion curvedfrom the spike, as is indicated at 3. 0n the corners of the plate 2there are provided curved fingers 1-, which extend about the edges ofthe spike, so that the plate may he slid longitudinally thereof. A bolt5extends between the intermediate portion 3 of the plate 2, and theadjacent portion of the spike 1. Washers 6 are provided on the bolt 1,at each edge of the spike 1, and are provided with extensions 7, asindicated in dotted lines in Figure 3,which engage the under surface ofthe spike 1. A bracket arm 8 pierces the head 9, of the bolt 5, be ingslidable therethrough and terminating in an eye 10, for-receiving theaxle 11 of a grooved wheel 12. It is to be noted that the axle'liextends to one side of the spike 1 therebelow. A nut 13 is preferablyprovided with a crank handle 14, and is threadably engaged with the bolt5, so that it may be tightened thereon to bear against the adjacentwasher 6 thereby drawing the head through the adjacent washer 6. Thisaction will draw the washers 6 against the edges of the spike 1, andforce the bracket arm 8, in frictional engagement with the adjacentwasher, thereby preventing movement of the-plate 2 longitudinally of thespike, and preventing movement of the arm 1 8 through the bolt head 9.It will be thus seen that the various "parts may be easily adjusted when:the nut 13 is loosened, so

that they may be placed in proper positions depending upon conditions,as will be apparent. The smooth edge of the sawis en'- gaged inv one ofthe grooves of the wheel 1.2

and may thus be reciprocated back and forth for undercutting the log. Asthe log is being undercut, it will have a tendency to break downwardly,at the strip being cut,

therefore preventing any binding on the saw. This is true in. theundercut, because the log is supported at its ends on its roots andbranches. It is apparent that the device may be used under anycircumstances, where the log issupported by its ends.

The present embodiment of the invention has been disclosed in detail,merely by way of example, and it is apparent that numerouschanges in thedetails of construction,

and in the combination and arrangement of parts may be resorted to,without departing from the spirit or scope of the invention ashereinafter claimed or sacrificing any of its advantages.

Having thus described my invention,

what I claim as new is:

1. A device of the class described includ-' ing a spike adapted to bedriven into a log, a plate slidable on the spike and having. its

intermediate portion .spaced therefrom, a

llli

bolt extending between the intermediate portion of the plate and theadjacent portion of the spike, washers on the bolt having extensionsdisposed under the spike, a nut on the bolt, a bracket arm s'lidablethrough the bolt so that when the nut is tightened up, said arm is heldin adjusted positions in relation to the bolt, and a wheel journaled onthe end of the arm.

2. A device ofthe class described including a spike adapted to beidriveninto a log, a plate slidable onthe spike and having its intermediateportion spaced therefrom,

a bolt extending between the intermediate portion of the plate and theadjacent portightened up, said arm is held in adjusted positionsin-relation to the bolt, and a wheel journaled on the end of the arm,said wheel being provided with van annular groove.

In testimony whereof I aflix my signature.

JOSEPH M. JENNINGS.

